Kinetic Study on the Oxidation of Elements in Hot Metal during Vanadium-Extraction Process

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• 作者：Weijun Huang ; Shan Yu ; Xiang Shen ; Lei Xu ; Nan Wang and Min Chen
• 刊名：steel research international
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：87
• 期：9
• 页码：1228-1237
• 全文大小：320K
• ISSN：1869-344X

文摘

A kinetic model of vanadium extraction from the metal bath has been established for describing the oxidation behavior of different elements including [V], [Ti], [Si], [Cr], [Mn], and [C] in the metal bath based on a 70 t practical vanadium-extraction converter. The results show that the calculated values using the models are in good agreement with practical measured values. The calculation results also show that the oxidation of silicon and titanium in the metal bath is rapid at the initial stage of blowing (0–1.5 min), and ends after 2 min. The intensive oxidation of vanadium happens at the intermediate stages of blowing (1.5–4.5 min), and the content of vanadium in the metal bath decreases from 0.278 to 0.04 mass%. At the final stage (4.5–5 min), the oxidation order of vanadium and carbon reverses, causing vigorous oxidation of carbon. Besides, manganese and chromium are oxidized throughout the intermediate and final stages, competing with vanadium for oxygen. To promote vanadium extraction from the metal bath under the conditions studied, the combined coolants should be adopted.